Fix an incompatibility with hamcrest 2.2

This test asserts on the message of an AssertionError thrown by a
failing hamcrest assertion. The message changes in the latest versions
of hamcrest.

```
1) testBadCoderIsNotDeterministic(org.apache.beam.sdk.testing.CoderPropertiesTest)
java.lang.AssertionError:
Expected: a string containing "<84>, <101>, <115>, <116>, <68>"
     but: was "
Expected: [<24b>, <84b>, <101b>, <115b>, <116b>, <68b>, <97b>, <116b>, <97b>, <51b>, <51b>, <50b>, <54b>, <49b>, <57b>, <57b>, <52b>, <57b>, <48b>, <57b>, <57b>, <55b>, <48b>, <53b>, <53b>]
     but: was [<24b>, <84b>, <101b>, <115b>, <116b>, <68b>, <97b>, <116b>, <97b>, <51b>, <51b>, <50b>, <54b>, <49b>, <57b>, <57b>, <52b>, <56b>, <50b>, <48b>, <52b>, <49b>, <54b>, <49b>, <53b>]"
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
        at org.apache.beam.sdk.testing.CoderPropertiesTest.testBadCoderIsNotDeterministic(CoderPropertiesTest.java:123)
```

sdks/java/core/src/test/java/org/apache/beam/sdk/testing/CoderPropertiesTest.java

@@ -120,7 +120,11 @@ public void testBadCoderIsNotDeterministic() throws Exception {
       error = e;
     }
     assertNotNull("Expected AssertionError", error);
-    assertThat(error.getMessage(), CoreMatchers.containsString("<84>, <101>, <115>, <116>, <68>"));
+    assertThat(
+        error.getMessage(),
+        CoreMatchers.anyOf(
+            CoreMatchers.containsString("<84>, <101>, <115>, <116>, <68>"),
+            CoreMatchers.containsString("<84b>, <101b>, <115b>, <116b>, <68b>")));
   }
 
   @Test